blob: 2634eba17ef1182b2f87f76d3ac053273926a92f [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/aura/window.h"
#include <algorithm>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "ui/aura/client/capture_client.h"
#include "ui/aura/client/cursor_client.h"
#include "ui/aura/client/event_client.h"
#include "ui/aura/client/focus_client.h"
#include "ui/aura/client/screen_position_client.h"
#include "ui/aura/client/visibility_client.h"
#include "ui/aura/client/window_stacking_client.h"
#include "ui/aura/env.h"
#include "ui/aura/layout_manager.h"
#include "ui/aura/window_delegate.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/aura/window_observer.h"
#include "ui/aura/window_tracker.h"
#include "ui/aura/window_tree_host.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/layer.h"
#include "ui/events/event_target_iterator.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/path.h"
#include "ui/gfx/scoped_canvas.h"
#include "ui/gfx/screen.h"
namespace aura {
class ScopedCursorHider {
public:
explicit ScopedCursorHider(Window* window)
: window_(window),
hid_cursor_(false) {
if (!window_->IsRootWindow())
return;
const bool cursor_is_in_bounds = window_->GetBoundsInScreen().Contains(
Env::GetInstance()->last_mouse_location());
client::CursorClient* cursor_client = client::GetCursorClient(window_);
if (cursor_is_in_bounds && cursor_client &&
cursor_client->IsCursorVisible()) {
cursor_client->HideCursor();
hid_cursor_ = true;
}
}
~ScopedCursorHider() {
if (!window_->IsRootWindow())
return;
// Update the device scale factor of the cursor client only when the last
// mouse location is on this root window.
if (hid_cursor_) {
client::CursorClient* cursor_client = client::GetCursorClient(window_);
if (cursor_client) {
const gfx::Display& display =
gfx::Screen::GetScreenFor(window_)->GetDisplayNearestWindow(
window_);
cursor_client->SetDisplay(display);
cursor_client->ShowCursor();
}
}
}
private:
Window* window_;
bool hid_cursor_;
DISALLOW_COPY_AND_ASSIGN(ScopedCursorHider);
};
Window::Window(WindowDelegate* delegate)
: host_(NULL),
type_(ui::wm::WINDOW_TYPE_UNKNOWN),
owned_by_parent_(true),
delegate_(delegate),
parent_(NULL),
visible_(false),
id_(-1),
transparent_(false),
user_data_(NULL),
ignore_events_(false),
// Don't notify newly added observers during notification. This causes
// problems for code that adds an observer as part of an observer
// notification (such as the workspace code).
observers_(base::ObserverList<WindowObserver>::NOTIFY_EXISTING_ONLY) {
SetTargetHandler(delegate_);
}
Window::~Window() {
if (layer()->owner() == this)
layer()->CompleteAllAnimations();
layer()->SuppressPaint();
// Let the delegate know we're in the processing of destroying.
if (delegate_)
delegate_->OnWindowDestroying(this);
FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowDestroying(this));
// While we are being destroyed, our target handler may also be in the
// process of destruction or already destroyed, so do not forward any
// input events at the ui::EP_TARGET phase.
SetTargetHandler(nullptr);
// TODO(beng): See comment in window_event_dispatcher.h. This shouldn't be
// necessary but unfortunately is right now due to ordering
// peculiarities. WED must be notified _after_ other observers
// are notified of pending teardown but before the hierarchy
// is actually torn down.
WindowTreeHost* host = GetHost();
if (host)
host->dispatcher()->OnPostNotifiedWindowDestroying(this);
// The window should have already had its state cleaned up in
// WindowEventDispatcher::OnWindowHidden(), but there have been some crashes
// involving windows being destroyed without being hidden first. See
// crbug.com/342040. This should help us debug the issue. TODO(tdresser):
// remove this once we determine why we have windows that are destroyed
// without being hidden.
bool window_incorrectly_cleaned_up = CleanupGestureState();
CHECK(!window_incorrectly_cleaned_up);
// Then destroy the children.
RemoveOrDestroyChildren();
// The window needs to be removed from the parent before calling the
// WindowDestroyed callbacks of delegate and the observers.
if (parent_)
parent_->RemoveChild(this);
if (delegate_)
delegate_->OnWindowDestroyed(this);
base::ObserverListBase<WindowObserver>::Iterator iter(&observers_);
for (WindowObserver* observer = iter.GetNext(); observer;
observer = iter.GetNext()) {
RemoveObserver(observer);
observer->OnWindowDestroyed(this);
}
// Clear properties.
for (std::map<const void*, Value>::const_iterator iter = prop_map_.begin();
iter != prop_map_.end();
++iter) {
if (iter->second.deallocator)
(*iter->second.deallocator)(iter->second.value);
}
prop_map_.clear();
// The layer will either be destroyed by |layer_owner_|'s dtor, or by whoever
// acquired it.
layer()->set_delegate(NULL);
DestroyLayer();
}
void Window::Init(ui::LayerType layer_type) {
SetLayer(new ui::Layer(layer_type));
layer()->SetVisible(false);
layer()->set_delegate(this);
UpdateLayerName();
layer()->SetFillsBoundsOpaquely(!transparent_);
Env::GetInstance()->NotifyWindowInitialized(this);
}
void Window::SetType(ui::wm::WindowType type) {
// Cannot change type after the window is initialized.
DCHECK(!layer());
type_ = type;
}
void Window::SetName(const std::string& name) {
name_ = name;
if (layer())
UpdateLayerName();
}
void Window::SetTitle(const base::string16& title) {
title_ = title;
FOR_EACH_OBSERVER(WindowObserver,
observers_,
OnWindowTitleChanged(this));
}
void Window::SetTransparent(bool transparent) {
transparent_ = transparent;
if (layer())
layer()->SetFillsBoundsOpaquely(!transparent_);
}
void Window::SetFillsBoundsCompletely(bool fills_bounds) {
layer()->SetFillsBoundsCompletely(fills_bounds);
}
Window* Window::GetRootWindow() {
return const_cast<Window*>(
static_cast<const Window*>(this)->GetRootWindow());
}
const Window* Window::GetRootWindow() const {
return IsRootWindow() ? this : parent_ ? parent_->GetRootWindow() : NULL;
}
WindowTreeHost* Window::GetHost() {
return const_cast<WindowTreeHost*>(const_cast<const Window*>(this)->
GetHost());
}
const WindowTreeHost* Window::GetHost() const {
const Window* root_window = GetRootWindow();
return root_window ? root_window->host_ : NULL;
}
void Window::Show() {
DCHECK_EQ(visible_, layer()->GetTargetVisibility());
// It is not allowed that a window is visible but the layers alpha is fully
// transparent since the window would still be considered to be active but
// could not be seen.
DCHECK(!visible_ || layer()->GetTargetOpacity() > 0.0f);
SetVisible(true);
}
void Window::Hide() {
// RootWindow::OnVisibilityChanged will call ReleaseCapture.
SetVisible(false);
}
bool Window::IsVisible() const {
// Layer visibility can be inconsistent with window visibility, for example
// when a Window is hidden, we want this function to return false immediately
// after, even though the client may decide to animate the hide effect (and
// so the layer will be visible for some time after Hide() is called).
return visible_ ? layer()->IsDrawn() : false;
}
gfx::Rect Window::GetBoundsInRootWindow() const {
// TODO(beng): There may be a better way to handle this, and the existing code
// is likely wrong anyway in a multi-display world, but this will
// do for now.
if (!GetRootWindow())
return bounds();
gfx::Rect bounds_in_root(bounds().size());
ConvertRectToTarget(this, GetRootWindow(), &bounds_in_root);
return bounds_in_root;
}
gfx::Rect Window::GetBoundsInScreen() const {
gfx::Rect bounds(GetBoundsInRootWindow());
const Window* root = GetRootWindow();
if (root) {
aura::client::ScreenPositionClient* screen_position_client =
aura::client::GetScreenPositionClient(root);
if (screen_position_client) {
gfx::Point origin = bounds.origin();
screen_position_client->ConvertPointToScreen(root, &origin);
bounds.set_origin(origin);
}
}
return bounds;
}
void Window::SetTransform(const gfx::Transform& transform) {
FOR_EACH_OBSERVER(WindowObserver, observers_,
OnWindowTransforming(this));
layer()->SetTransform(transform);
FOR_EACH_OBSERVER(WindowObserver, observers_,
OnWindowTransformed(this));
NotifyAncestorWindowTransformed(this);
}
void Window::SetLayoutManager(LayoutManager* layout_manager) {
if (layout_manager == layout_manager_.get())
return;
layout_manager_.reset(layout_manager);
if (!layout_manager)
return;
// If we're changing to a new layout manager, ensure it is aware of all the
// existing child windows.
for (Windows::const_iterator it = children_.begin();
it != children_.end();
++it)
layout_manager_->OnWindowAddedToLayout(*it);
}
scoped_ptr<ui::EventTargeter>
Window::SetEventTargeter(scoped_ptr<ui::EventTargeter> targeter) {
scoped_ptr<ui::EventTargeter> old_targeter = targeter_.Pass();
targeter_ = targeter.Pass();
return old_targeter.Pass();
}
void Window::SetBounds(const gfx::Rect& new_bounds) {
if (parent_ && parent_->layout_manager())
parent_->layout_manager()->SetChildBounds(this, new_bounds);
else {
// Ensure we don't go smaller than our minimum bounds.
gfx::Rect final_bounds(new_bounds);
if (delegate_) {
const gfx::Size& min_size = delegate_->GetMinimumSize();
final_bounds.set_width(std::max(min_size.width(), final_bounds.width()));
final_bounds.set_height(std::max(min_size.height(),
final_bounds.height()));
}
SetBoundsInternal(final_bounds);
}
}
void Window::SetBoundsInScreen(const gfx::Rect& new_bounds_in_screen,
const gfx::Display& dst_display) {
Window* root = GetRootWindow();
if (root) {
aura::client::ScreenPositionClient* screen_position_client =
aura::client::GetScreenPositionClient(root);
screen_position_client->SetBounds(this, new_bounds_in_screen, dst_display);
return;
}
SetBounds(new_bounds_in_screen);
}
gfx::Rect Window::GetTargetBounds() const {
return layer() ? layer()->GetTargetBounds() : bounds();
}
void Window::SchedulePaintInRect(const gfx::Rect& rect) {
layer()->SchedulePaint(rect);
}
void Window::StackChildAtTop(Window* child) {
if (children_.size() <= 1 || child == children_.back())
return; // In the front already.
StackChildAbove(child, children_.back());
}
void Window::StackChildAbove(Window* child, Window* target) {
StackChildRelativeTo(child, target, STACK_ABOVE);
}
void Window::StackChildAtBottom(Window* child) {
if (children_.size() <= 1 || child == children_.front())
return; // At the bottom already.
StackChildBelow(child, children_.front());
}
void Window::StackChildBelow(Window* child, Window* target) {
StackChildRelativeTo(child, target, STACK_BELOW);
}
void Window::AddChild(Window* child) {
DCHECK(layer()) << "Parent has not been Init()ed yet.";
DCHECK(child->layer()) << "Child has not been Init()ed yt.";
WindowObserver::HierarchyChangeParams params;
params.target = child;
params.new_parent = this;
params.old_parent = child->parent();
params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING;
NotifyWindowHierarchyChange(params);
Window* old_root = child->GetRootWindow();
DCHECK(std::find(children_.begin(), children_.end(), child) ==
children_.end());
if (child->parent())
child->parent()->RemoveChildImpl(child, this);
child->parent_ = this;
layer()->Add(child->layer());
children_.push_back(child);
if (layout_manager_)
layout_manager_->OnWindowAddedToLayout(child);
FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowAdded(child));
child->OnParentChanged();
Window* root_window = GetRootWindow();
if (root_window && old_root != root_window) {
root_window->GetHost()->dispatcher()->OnWindowAddedToRootWindow(child);
child->NotifyAddedToRootWindow();
}
params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED;
NotifyWindowHierarchyChange(params);
}
void Window::RemoveChild(Window* child) {
WindowObserver::HierarchyChangeParams params;
params.target = child;
params.new_parent = NULL;
params.old_parent = this;
params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING;
NotifyWindowHierarchyChange(params);
RemoveChildImpl(child, NULL);
params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED;
NotifyWindowHierarchyChange(params);
}
bool Window::Contains(const Window* other) const {
for (const Window* parent = other; parent; parent = parent->parent_) {
if (parent == this)
return true;
}
return false;
}
Window* Window::GetChildById(int id) {
return const_cast<Window*>(const_cast<const Window*>(this)->GetChildById(id));
}
const Window* Window::GetChildById(int id) const {
Windows::const_iterator i;
for (i = children_.begin(); i != children_.end(); ++i) {
if ((*i)->id() == id)
return *i;
const Window* result = (*i)->GetChildById(id);
if (result)
return result;
}
return NULL;
}
// static
void Window::ConvertPointToTarget(const Window* source,
const Window* target,
gfx::Point* point) {
if (!source)
return;
if (source->GetRootWindow() != target->GetRootWindow()) {
client::ScreenPositionClient* source_client =
client::GetScreenPositionClient(source->GetRootWindow());
// |source_client| can be NULL in tests.
if (source_client)
source_client->ConvertPointToScreen(source, point);
client::ScreenPositionClient* target_client =
client::GetScreenPositionClient(target->GetRootWindow());
// |target_client| can be NULL in tests.
if (target_client)
target_client->ConvertPointFromScreen(target, point);
} else {
ui::Layer::ConvertPointToLayer(source->layer(), target->layer(), point);
}
}
// static
void Window::ConvertRectToTarget(const Window* source,
const Window* target,
gfx::Rect* rect) {
DCHECK(rect);
gfx::Point origin = rect->origin();
ConvertPointToTarget(source, target, &origin);
rect->set_origin(origin);
}
void Window::MoveCursorTo(const gfx::Point& point_in_window) {
Window* root_window = GetRootWindow();
DCHECK(root_window);
gfx::Point point_in_root(point_in_window);
ConvertPointToTarget(this, root_window, &point_in_root);
root_window->GetHost()->MoveCursorTo(point_in_root);
}
gfx::NativeCursor Window::GetCursor(const gfx::Point& point) const {
return delegate_ ? delegate_->GetCursor(point) : gfx::kNullCursor;
}
void Window::AddObserver(WindowObserver* observer) {
observer->OnObservingWindow(this);
observers_.AddObserver(observer);
}
void Window::RemoveObserver(WindowObserver* observer) {
observer->OnUnobservingWindow(this);
observers_.RemoveObserver(observer);
}
bool Window::HasObserver(const WindowObserver* observer) const {
return observers_.HasObserver(observer);
}
bool Window::ContainsPointInRoot(const gfx::Point& point_in_root) const {
const Window* root_window = GetRootWindow();
if (!root_window)
return false;
gfx::Point local_point(point_in_root);
ConvertPointToTarget(root_window, this, &local_point);
return gfx::Rect(GetTargetBounds().size()).Contains(local_point);
}
bool Window::ContainsPoint(const gfx::Point& local_point) const {
return gfx::Rect(bounds().size()).Contains(local_point);
}
Window* Window::GetEventHandlerForPoint(const gfx::Point& local_point) {
return GetWindowForPoint(local_point, true, true);
}
Window* Window::GetTopWindowContainingPoint(const gfx::Point& local_point) {
return GetWindowForPoint(local_point, false, false);
}
Window* Window::GetToplevelWindow() {
Window* topmost_window_with_delegate = NULL;
for (aura::Window* window = this; window != NULL; window = window->parent()) {
if (window->delegate())
topmost_window_with_delegate = window;
}
return topmost_window_with_delegate;
}
void Window::Focus() {
client::FocusClient* client = client::GetFocusClient(this);
DCHECK(client);
client->FocusWindow(this);
}
bool Window::HasFocus() const {
client::FocusClient* client = client::GetFocusClient(this);
return client && client->GetFocusedWindow() == this;
}
bool Window::CanFocus() const {
if (IsRootWindow())
return IsVisible();
// NOTE: as part of focusing the window the ActivationClient may make the
// window visible (by way of making a hidden ancestor visible). For this
// reason we can't check visibility here and assume the client is doing it.
if (!parent_ || (delegate_ && !delegate_->CanFocus()))
return false;
// The client may forbid certain windows from receiving focus at a given point
// in time.
client::EventClient* client = client::GetEventClient(GetRootWindow());
if (client && !client->CanProcessEventsWithinSubtree(this))
return false;
return parent_->CanFocus();
}
bool Window::CanReceiveEvents() const {
if (IsRootWindow())
return IsVisible();
// The client may forbid certain windows from receiving events at a given
// point in time.
client::EventClient* client = client::GetEventClient(GetRootWindow());
if (client && !client->CanProcessEventsWithinSubtree(this))
return false;
return parent_ && IsVisible() && parent_->CanReceiveEvents();
}
void Window::SetCapture() {
if (!IsVisible())
return;
Window* root_window = GetRootWindow();
if (!root_window)
return;
client::CaptureClient* capture_client = client::GetCaptureClient(root_window);
if (!capture_client)
return;
client::GetCaptureClient(root_window)->SetCapture(this);
}
void Window::ReleaseCapture() {
Window* root_window = GetRootWindow();
if (!root_window)
return;
client::CaptureClient* capture_client = client::GetCaptureClient(root_window);
if (!capture_client)
return;
client::GetCaptureClient(root_window)->ReleaseCapture(this);
}
bool Window::HasCapture() {
Window* root_window = GetRootWindow();
if (!root_window)
return false;
client::CaptureClient* capture_client = client::GetCaptureClient(root_window);
return capture_client && capture_client->GetCaptureWindow() == this;
}
void Window::SuppressPaint() {
layer()->SuppressPaint();
}
// {Set,Get,Clear}Property are implemented in window_property.h.
void Window::SetNativeWindowProperty(const char* key, void* value) {
SetPropertyInternal(
key, key, NULL, reinterpret_cast<int64>(value), 0);
}
void* Window::GetNativeWindowProperty(const char* key) const {
return reinterpret_cast<void*>(GetPropertyInternal(key, 0));
}
void Window::OnDeviceScaleFactorChanged(float device_scale_factor) {
ScopedCursorHider hider(this);
if (delegate_)
delegate_->OnDeviceScaleFactorChanged(device_scale_factor);
}
#if !defined(NDEBUG)
std::string Window::GetDebugInfo() const {
return base::StringPrintf(
"%s<%d> bounds(%d, %d, %d, %d) %s %s opacity=%.1f",
name().empty() ? "Unknown" : name().c_str(), id(),
bounds().x(), bounds().y(), bounds().width(), bounds().height(),
visible_ ? "WindowVisible" : "WindowHidden",
layer() ?
(layer()->GetTargetVisibility() ? "LayerVisible" : "LayerHidden") :
"NoLayer",
layer() ? layer()->opacity() : 1.0f);
}
void Window::PrintWindowHierarchy(int depth) const {
VLOG(0) << base::StringPrintf(
"%*s%s", depth * 2, "", GetDebugInfo().c_str());
for (Windows::const_iterator it = children_.begin();
it != children_.end(); ++it) {
Window* child = *it;
child->PrintWindowHierarchy(depth + 1);
}
}
#endif
void Window::RemoveOrDestroyChildren() {
while (!children_.empty()) {
Window* child = children_[0];
if (child->owned_by_parent_) {
delete child;
// Deleting the child so remove it from out children_ list.
DCHECK(std::find(children_.begin(), children_.end(), child) ==
children_.end());
} else {
// Even if we can't delete the child, we still need to remove it from the
// parent so that relevant bookkeeping (parent_ back-pointers etc) are
// updated.
RemoveChild(child);
}
}
}
///////////////////////////////////////////////////////////////////////////////
// Window, private:
int64 Window::SetPropertyInternal(const void* key,
const char* name,
PropertyDeallocator deallocator,
int64 value,
int64 default_value) {
int64 old = GetPropertyInternal(key, default_value);
if (value == default_value) {
prop_map_.erase(key);
} else {
Value prop_value;
prop_value.name = name;
prop_value.value = value;
prop_value.deallocator = deallocator;
prop_map_[key] = prop_value;
}
FOR_EACH_OBSERVER(WindowObserver, observers_,
OnWindowPropertyChanged(this, key, old));
return old;
}
int64 Window::GetPropertyInternal(const void* key,
int64 default_value) const {
std::map<const void*, Value>::const_iterator iter = prop_map_.find(key);
if (iter == prop_map_.end())
return default_value;
return iter->second.value;
}
bool Window::HitTest(const gfx::Point& local_point) {
gfx::Rect local_bounds(bounds().size());
if (!delegate_ || !delegate_->HasHitTestMask())
return local_bounds.Contains(local_point);
gfx::Path mask;
delegate_->GetHitTestMask(&mask);
SkRegion clip_region;
clip_region.setRect(local_bounds.x(), local_bounds.y(),
local_bounds.width(), local_bounds.height());
SkRegion mask_region;
return mask_region.setPath(mask, clip_region) &&
mask_region.contains(local_point.x(), local_point.y());
}
void Window::SetBoundsInternal(const gfx::Rect& new_bounds) {
gfx::Rect old_bounds = GetTargetBounds();
// Always need to set the layer's bounds -- even if it is to the same thing.
// This may cause important side effects such as stopping animation.
layer()->SetBounds(new_bounds);
// If we are currently not the layer's delegate, we will not get bounds
// changed notification from the layer (this typically happens after animating
// hidden). We must notify ourselves.
if (layer()->delegate() != this)
OnWindowBoundsChanged(old_bounds);
}
void Window::SetVisible(bool visible) {
if (visible == layer()->GetTargetVisibility())
return; // No change.
FOR_EACH_OBSERVER(WindowObserver, observers_,
OnWindowVisibilityChanging(this, visible));
client::VisibilityClient* visibility_client =
client::GetVisibilityClient(this);
if (visibility_client)
visibility_client->UpdateLayerVisibility(this, visible);
else
layer()->SetVisible(visible);
visible_ = visible;
SchedulePaint();
if (parent_ && parent_->layout_manager_)
parent_->layout_manager_->OnChildWindowVisibilityChanged(this, visible);
if (delegate_)
delegate_->OnWindowTargetVisibilityChanged(visible);
NotifyWindowVisibilityChanged(this, visible);
}
void Window::SchedulePaint() {
SchedulePaintInRect(gfx::Rect(0, 0, bounds().width(), bounds().height()));
}
void Window::Paint(const ui::PaintContext& context) {
if (delegate_)
delegate_->OnPaint(context);
}
Window* Window::GetWindowForPoint(const gfx::Point& local_point,
bool return_tightest,
bool for_event_handling) {
if (!IsVisible())
return NULL;
if ((for_event_handling && !HitTest(local_point)) ||
(!for_event_handling && !ContainsPoint(local_point)))
return NULL;
// Check if I should claim this event and not pass it to my children because
// the location is inside my hit test override area. For details, see
// set_hit_test_bounds_override_inner().
if (for_event_handling && !hit_test_bounds_override_inner_.IsEmpty()) {
gfx::Rect inset_local_bounds(gfx::Point(), bounds().size());
inset_local_bounds.Inset(hit_test_bounds_override_inner_);
// We know we're inside the normal local bounds, so if we're outside the
// inset bounds we must be in the special hit test override area.
DCHECK(HitTest(local_point));
if (!inset_local_bounds.Contains(local_point))
return delegate_ ? this : NULL;
}
if (!return_tightest && delegate_)
return this;
for (Windows::const_reverse_iterator it = children_.rbegin(),
rend = children_.rend();
it != rend; ++it) {
Window* child = *it;
if (for_event_handling) {
if (child->ignore_events_)
continue;
// The client may not allow events to be processed by certain subtrees.
client::EventClient* client = client::GetEventClient(GetRootWindow());
if (client && !client->CanProcessEventsWithinSubtree(child))
continue;
if (delegate_ && !delegate_->ShouldDescendIntoChildForEventHandling(
child, local_point))
continue;
}
gfx::Point point_in_child_coords(local_point);
ConvertPointToTarget(this, child, &point_in_child_coords);
Window* match = child->GetWindowForPoint(point_in_child_coords,
return_tightest,
for_event_handling);
if (match)
return match;
}
return delegate_ ? this : NULL;
}
void Window::RemoveChildImpl(Window* child, Window* new_parent) {
if (layout_manager_)
layout_manager_->OnWillRemoveWindowFromLayout(child);
FOR_EACH_OBSERVER(WindowObserver, observers_, OnWillRemoveWindow(child));
Window* root_window = child->GetRootWindow();
Window* new_root_window = new_parent ? new_parent->GetRootWindow() : NULL;
if (root_window && root_window != new_root_window)
child->NotifyRemovingFromRootWindow(new_root_window);
if (child->OwnsLayer())
layer()->Remove(child->layer());
child->parent_ = NULL;
Windows::iterator i = std::find(children_.begin(), children_.end(), child);
DCHECK(i != children_.end());
children_.erase(i);
child->OnParentChanged();
if (layout_manager_)
layout_manager_->OnWindowRemovedFromLayout(child);
}
void Window::OnParentChanged() {
FOR_EACH_OBSERVER(
WindowObserver, observers_, OnWindowParentChanged(this, parent_));
}
void Window::StackChildRelativeTo(Window* child,
Window* target,
StackDirection direction) {
DCHECK_NE(child, target);
DCHECK(child);
DCHECK(target);
DCHECK_EQ(this, child->parent());
DCHECK_EQ(this, target->parent());
client::WindowStackingClient* stacking_client =
client::GetWindowStackingClient();
if (stacking_client &&
!stacking_client->AdjustStacking(&child, &target, &direction))
return;
const size_t child_i =
std::find(children_.begin(), children_.end(), child) - children_.begin();
const size_t target_i =
std::find(children_.begin(), children_.end(), target) - children_.begin();
// Don't move the child if it is already in the right place.
if ((direction == STACK_ABOVE && child_i == target_i + 1) ||
(direction == STACK_BELOW && child_i + 1 == target_i))
return;
const size_t dest_i =
direction == STACK_ABOVE ?
(child_i < target_i ? target_i : target_i + 1) :
(child_i < target_i ? target_i - 1 : target_i);
children_.erase(children_.begin() + child_i);
children_.insert(children_.begin() + dest_i, child);
StackChildLayerRelativeTo(child, target, direction);
child->OnStackingChanged();
}
void Window::StackChildLayerRelativeTo(Window* child,
Window* target,
StackDirection direction) {
DCHECK(layer() && child->layer() && target->layer());
if (direction == STACK_ABOVE)
layer()->StackAbove(child->layer(), target->layer());
else
layer()->StackBelow(child->layer(), target->layer());
}
void Window::OnStackingChanged() {
FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowStackingChanged(this));
}
void Window::NotifyRemovingFromRootWindow(Window* new_root) {
FOR_EACH_OBSERVER(WindowObserver, observers_,
OnWindowRemovingFromRootWindow(this, new_root));
for (Window::Windows::const_iterator it = children_.begin();
it != children_.end(); ++it) {
(*it)->NotifyRemovingFromRootWindow(new_root);
}
}
void Window::NotifyAddedToRootWindow() {
FOR_EACH_OBSERVER(WindowObserver, observers_,
OnWindowAddedToRootWindow(this));
for (Window::Windows::const_iterator it = children_.begin();
it != children_.end(); ++it) {
(*it)->NotifyAddedToRootWindow();
}
}
void Window::NotifyWindowHierarchyChange(
const WindowObserver::HierarchyChangeParams& params) {
params.target->NotifyWindowHierarchyChangeDown(params);
switch (params.phase) {
case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING:
if (params.old_parent)
params.old_parent->NotifyWindowHierarchyChangeUp(params);
break;
case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED:
if (params.new_parent)
params.new_parent->NotifyWindowHierarchyChangeUp(params);
break;
default:
NOTREACHED();
break;
}
}
void Window::NotifyWindowHierarchyChangeDown(
const WindowObserver::HierarchyChangeParams& params) {
NotifyWindowHierarchyChangeAtReceiver(params);
for (Window::Windows::const_iterator it = children_.begin();
it != children_.end(); ++it) {
(*it)->NotifyWindowHierarchyChangeDown(params);
}
}
void Window::NotifyWindowHierarchyChangeUp(
const WindowObserver::HierarchyChangeParams& params) {
for (Window* window = this; window; window = window->parent())
window->NotifyWindowHierarchyChangeAtReceiver(params);
}
void Window::NotifyWindowHierarchyChangeAtReceiver(
const WindowObserver::HierarchyChangeParams& params) {
WindowObserver::HierarchyChangeParams local_params = params;
local_params.receiver = this;
switch (params.phase) {
case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING:
FOR_EACH_OBSERVER(WindowObserver, observers_,
OnWindowHierarchyChanging(local_params));
break;
case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED:
FOR_EACH_OBSERVER(WindowObserver, observers_,
OnWindowHierarchyChanged(local_params));
break;
default:
NOTREACHED();
break;
}
}
void Window::NotifyWindowVisibilityChanged(aura::Window* target,
bool visible) {
if (!NotifyWindowVisibilityChangedDown(target, visible)) {
return; // |this| has been deleted.
}
NotifyWindowVisibilityChangedUp(target, visible);
}
bool Window::NotifyWindowVisibilityChangedAtReceiver(aura::Window* target,
bool visible) {
// |this| may be deleted during a call to OnWindowVisibilityChanged() on one
// of the observers. We create an local observer for that. In that case we
// exit without further access to any members.
WindowTracker tracker;
tracker.Add(this);
FOR_EACH_OBSERVER(WindowObserver, observers_,
OnWindowVisibilityChanged(target, visible));
return tracker.Contains(this);
}
bool Window::NotifyWindowVisibilityChangedDown(aura::Window* target,
bool visible) {
if (!NotifyWindowVisibilityChangedAtReceiver(target, visible))
return false; // |this| was deleted.
std::set<const Window*> child_already_processed;
bool child_destroyed = false;
do {
child_destroyed = false;
for (Window::Windows::const_iterator it = children_.begin();
it != children_.end(); ++it) {
if (!child_already_processed.insert(*it).second)
continue;
if (!(*it)->NotifyWindowVisibilityChangedDown(target, visible)) {
// |*it| was deleted, |it| is invalid and |children_| has changed.
// We exit the current for-loop and enter a new one.
child_destroyed = true;
break;
}
}
} while (child_destroyed);
return true;
}
void Window::NotifyWindowVisibilityChangedUp(aura::Window* target,
bool visible) {
// Start with the parent as we already notified |this|
// in NotifyWindowVisibilityChangedDown.
for (Window* window = parent(); window; window = window->parent()) {
bool ret = window->NotifyWindowVisibilityChangedAtReceiver(target, visible);
DCHECK(ret);
}
}
void Window::NotifyAncestorWindowTransformed(Window* source) {
FOR_EACH_OBSERVER(WindowObserver, observers_,
OnAncestorWindowTransformed(source, this));
for (Window::Windows::const_iterator it = children_.begin();
it != children_.end(); ++it) {
(*it)->NotifyAncestorWindowTransformed(source);
}
}
void Window::OnWindowBoundsChanged(const gfx::Rect& old_bounds) {
bounds_ = layer()->bounds();
if (layout_manager_)
layout_manager_->OnWindowResized();
if (delegate_)
delegate_->OnBoundsChanged(old_bounds, bounds());
FOR_EACH_OBSERVER(WindowObserver,
observers_,
OnWindowBoundsChanged(this, old_bounds, bounds()));
}
bool Window::CleanupGestureState() {
bool state_modified = false;
state_modified |= ui::GestureRecognizer::Get()->CancelActiveTouches(this);
state_modified |=
ui::GestureRecognizer::Get()->CleanupStateForConsumer(this);
for (Window::Windows::iterator iter = children_.begin();
iter != children_.end();
++iter) {
state_modified |= (*iter)->CleanupGestureState();
}
return state_modified;
}
void Window::OnPaintLayer(const ui::PaintContext& context) {
Paint(context);
}
void Window::OnDelegatedFrameDamage(const gfx::Rect& damage_rect_in_dip) {
DCHECK(layer());
FOR_EACH_OBSERVER(WindowObserver,
observers_,
OnDelegatedFrameDamage(this, damage_rect_in_dip));
}
base::Closure Window::PrepareForLayerBoundsChange() {
return base::Bind(&Window::OnWindowBoundsChanged, base::Unretained(this),
bounds());
}
bool Window::CanAcceptEvent(const ui::Event& event) {
// The client may forbid certain windows from receiving events at a given
// point in time.
client::EventClient* client = client::GetEventClient(GetRootWindow());
if (client && !client->CanProcessEventsWithinSubtree(this))
return false;
// We need to make sure that a touch cancel event and any gesture events it
// creates can always reach the window. This ensures that we receive a valid
// touch / gesture stream.
if (event.IsEndingEvent())
return true;
if (!IsVisible())
return false;
// The top-most window can always process an event.
if (!parent_)
return true;
// For located events (i.e. mouse, touch etc.), an assumption is made that
// windows that don't have a default event-handler cannot process the event
// (see more in GetWindowForPoint()). This assumption is not made for key
// events.
return event.IsKeyEvent() || target_handler();
}
ui::EventTarget* Window::GetParentTarget() {
if (IsRootWindow()) {
return client::GetEventClient(this) ?
client::GetEventClient(this)->GetToplevelEventTarget() :
Env::GetInstance();
}
return parent_;
}
scoped_ptr<ui::EventTargetIterator> Window::GetChildIterator() const {
return make_scoped_ptr(new ui::EventTargetIteratorImpl<Window>(children()));
}
ui::EventTargeter* Window::GetEventTargeter() {
return targeter_.get();
}
void Window::ConvertEventToTarget(ui::EventTarget* target,
ui::LocatedEvent* event) {
event->ConvertLocationToTarget(this,
static_cast<Window*>(target));
}
void Window::UpdateLayerName() {
#if !defined(NDEBUG)
DCHECK(layer());
std::string layer_name(name_);
if (layer_name.empty())
layer_name = "Unnamed Window";
if (id_ != -1)
layer_name += " " + base::IntToString(id_);
layer()->set_name(layer_name);
#endif
}
} // namespace aura